Mercury Systems, Inc.
US ˙ NasdaqGS ˙ US5893781089

SecurityMRCY / Mercury Systems, Inc.
InstitutionSignaturefd, Llc
Latest Disclosed Ownership817 shares
Latest Disclosed Value $ 59,567
Signaturefd, Llc reports 1.62% increase in ownership of MRCY / Mercury Systems, Inc.

On April 7, 2026 - Signaturefd, Llc filed a 13F-HR form disclosing ownership of 817 shares of Mercury Systems, Inc. (US:MRCY) valued at $59,567 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 20, 2026 disclosing 804 shares of Mercury Systems, Inc.. This represents a change in shares of 1.62% during the quarter. The current value of the position is $90,908 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-04-07 2026-03-31 13F MERCURY SYS COM 589378108 817 13 1.62 60 1.72 0.0009
2026-01-20 2025-12-31 13F MERCURY SYS COM 589378108 804 107 15.35 59 9.43 0.0009
2025-10-21 2025-09-30 13F MERCURY SYS COM 589378108 697 5 0.72 54 43.24 0.0009
2025-07-16 2025-06-30 13F MERCURY SYS COM 589378108 692 20 2.98 37 32.14 0.0006
2025-05-02 2025-03-31 13F MERCURY SYS COM 589378108 672 0 0.00 29 0.00 0.0005
2025-02-10 2024-12-31 13F MERCURY SYS COM 589378108 672 6 0.90 28 16.67 0.0005
2024-10-21 2024-09-30 13F MERCURY SYS COM 589378108 666 393 143.96 25 242.86 0.0005
2024-07-29 2024-06-30 13F MERCURY SYS COM 589378108 273 131 92.25 7 75.00 0.0001
2024-05-03 2024-03-31 13F MERCURY SYS COM 589378108 142 101 246.34 4 300.00 0.0001
2024-02-01 2023-12-31 13F MERCURY SYS COM 589378108 41 -129 -75.88 1 -83.33 0.0000
2023-11-03 2023-09-30 13F MERCURY SYS COM 589378108 170 -44 -20.56 6 -14.29 0.0002
2023-08-01 2023-06-30 13F MERCURY SYS COM 589378108 214 -245 -53.38 7 -69.57 0.0002
2023-04-28 2023-03-31 13F MERCURY SYS COM 589378108 459 -33 -6.71 23 4.55 0.0006
2023-01-30 2022-12-31 13F MERCURY SYS COM 589378108 492 77 18.55 22 29.41 0.0006
2022-11-08 2022-09-30 13F MERCURY SYS COM 589378108 415 -182 -30.49 17 -55.26 0.0006
2022-08-10 2022-06-30 13F MERCURY SYS COM 589378108 597 -6 -1.00 38 -2.56 0.0013
2022-05-02 2022-03-31 13F MERCURY SYS COM 589378108 603 -30 -4.74 39 11.43 0.0012
2022-01-25 2021-12-31 13F MERCURY SYS COM 589378108 633 103 19.43 35 40.00 0.0011
2021-10-28 2021-09-30 13F MERCURY SYS COM 589378108 530 329 163.68 25 92.31 0.0009
2021-07-26 2021-06-30 13F MERCURY SYS COM 589378108 201 139 224.19 13 225.00 0.0005
2021-04-30 2021-03-31 13F MERCURY SYS COM 589378108 62 -19 -23.46 4 -42.86 0.0002
2021-02-11 2020-12-31 13F MERCURY SYS COM 589378108 81 -26 -24.30 7 -12.50 0.0003
2020-11-03 2020-09-30 13F MERCURY SYS COM 589378108 107 -90 -45.69 8 -46.67 0.0004
2020-07-30 2020-06-30 13F MERCURY SYS COM 589378108 197 162 462.86 15 650.00 0.0009
2020-04-23 2020-03-31 13F MERCURY SYS COM 589378108 35 19 118.75 2 100.00 0.0002
2020-02-05 2019-12-31 13F MERCURY SYS COM 589378108 16 0 0.00 1 0.00 0.0001
2019-10-16 2019-09-30 13F MERCURY SYS COM 589378108 16 0 0.00 1 0.00 0.0001
2019-07-31 2019-06-30 13F MERCURY SYS COM 589378108 16 0 0.00 1 0.00 0.0001
2019-05-09 2019-03-31 13F MERCURY SYS COM 589378108 16 0 0.00 1 0.00 0.0001
2019-02-13 2018-12-31 13F MERCURY SYS COM 589378108 16 0 0.00 1 0.00 0.0001
2018-11-14 2018-09-30 13F MERCURY SYS COM 589378108 16 0 0.00 1 0.00 0.0001
2018-08-14 2018-06-30 13F MERCURY SYS COM 589378108 16 0 0.00 1 0.00 0.0001
2018-05-08 2018-03-31 13F MERCURY SYS COM 589378108 16 16 1 0.0001
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.